Dr. Kron has worked for ov

NSGP Executive Board

Steffen Fuller, PhD, CGP


Steffen  Fuller, PhD, CGP, is a licensed psychologist with over 25 years  of experience in psychological assessment and psychotherapy. He has a private practice, with offices in Belmont and Newton. He is on staff at Tufts  Medical School and adjunct faculty at Cambridge College. Steffen’s practice concentrates primarily on individual, family and group psychotherapies, neuropsychological and personality testing and consultation to workplaces and systems.

Ann Koplow, LICSW


Group psychotherapy is Ann’s passion and NSGP has fueled, illuminated, informed, and expanded this passion since she first connected with the organization in the 1990s.  During the twelve years when she was a clinician and then the director for a group-based psychiatric day treatment program, her contact with NSGP guided her growth as a group practitioner. Today, as Ann develops and facilitates open-access groups at the Primary Care Practice at Beth Israel Deaconess Medical Center, she continues to enhance her knowledge and skills at the yearly conference and through NSGP's other learning opportunities.  Ann notes that she is, "...proud to serve on the board of an organization which has meant so much to me, personally and professionally.

Debora Carmichael, PhD, CGP

   Past President

Debora Carmichael, PhD, CGP believes "It takes courage and curiosity to engage in the process of therapy.”  She appreciates that and works respectfully to create a therapeutic relationship that is collaborative. Her approach draws on relational principles informed by an appreciation of women's psychological development and the role of relationships in all our lives as well as psychodynamic principles. Deb has more than twenty-five years of experience in the mental health field and has found the process of developing a therapeutic relationship to be profound, provocative and above all uniquely important in nurturing change. She sees adults and enjoys couples work very much. 

Deb also has a passion for groups, holds a Certification in Group Psychotherapy (CGP) and serves as President of the Northeastern Society for Group Psychotherapy. Deb has a private practice in Cambridge and is an Instructor at McLean Hospital, an affiliate of Harvard Medical School/Massachusetts General Hospital.

  Guy R. Croteau, LICSW


Guy R. Croteau is psychotherapist in private practice in Downtown Boston. He previously spent 7 years as a  staff clinician at Fenway Health where he led many group for the LGBTQ community and served on the multi disciplinary clinical team for Transgender Health. Guy completed a post masters program at Boston University for the assessment and treatment of trauma and works with individuals and couples for diverse communities. Guy is an active member of NSGP and has served on the NSGP Conference Registration committee for the past two year.

Jenn DeSouza, MSW, LICSW, CGP


Jennifer DeSouza, MSW, LICSW, CGP received her Masters in Social Work from Boston College in 1999. Jennifer received her CGP in 2013 after completing the NSGP training program and she is currently participating in the Modern Psychoanalytic weekend training program at the Center for Group Studies in New York City. As an experienced social worker Jennifer has practiced in community mental health settings providing evaluation and treatment to individuals, families and groups. Jennifer currently manages the Group Therapy Program at Massachusetts General Hospital where she also provides individual therapy and consultations referral and resource information to patients and families.


       Joseph DeAngelis, LICSW

Debra Filiurin, LMHC, CGP

Debra Filiurin is a psychotherapist and mediator in Cambridge, MA. She has been in private practice for 33 years, working with individuals, couples, families and groups. Debra is the District Court Supervisor for the Community Dispute Settlement Center, Cambridge, MA. As a life member, past committee chair and conference presenter, Debra remains committed to NSGP as a leader in advocating for the vital modality of group psychotherapy. As a board member she supports NSGP’s  continued effort to provide education, training,                                   and relevant programming and resources to our membership and professional                                    community.

Melissa Kelly, LICSW

Melissa Kelly LICSW is a clinical social worker with a private practice in Cambridge, MA.  She has clinical training and experience in both psychodynamic therapy and ACT (Acceptance and Commitment Therapy) and enjoys applying both lenses in the treatment of individuals, adults and groups.  She is currently serving as co-chair of the NSGP Publicity and Marketing Committee and has previously been on the Conference Committee as the chair of Site.  In her spare time she likes to write and rock climb.

   Caleb Englander, LICSW

Caleb Englander, LICSW, works with children, adolescents, and adults in psychotherapy at his practice in Cambridge MA. He currently leads a therapy group for young adults. Previously, Caleb has worked in community mental health, wilderness therapy programs, and residential settings. In addition to being a proud member of NSGP, Caleb is in training at the Massachusetts Institute for Psychoanalysis.


  Lawrence Kron, JD, PhD 

Dr. Kron has worked for over 30 years as a licensed psychologist in private practice  and maintains  active practices in Michigan and Massachusetts. He works with individuals, couples and groups and has particular expertise working with couples in group. He also works extensively with patients and their caregivers who are dealing with physical illnesses and limitations. Prior to developing his psychology practice, he practiced as an attorney in Michigan for over 20 years.

Amy Matias, LICSW, PhD

Amy Matias is a licensed independent clinical social worker and has a Ph.D. in biochemistry. Her scientific background informs her work in the field of psychotherapy utilizing current research in neuroscience to guide her treatment approach. She has a private practice in Cambridge, Massachusetts where she provides psychotherapy to individuals, couples and groups. She offers a mixed gender interpersonal group and a women’s childhood trauma group.  At the Healing Ministry of the Archdiocese of Boston, Amy has provided trainings for mental health professionals and workshops for trauma survivors.

Amy provides self-care retreat programs for women that combine a step-by-step process with mindfulness-based strategies to help identify and sustain priorities that support greater emotional well-being.  Amy has also been a return speaker at the Arlington Chamber of Commerce Women’s Networking Group.  You can see videos of Amy’s presentations at her website www.matiascounseling.com.

Michelle McGrath, LICSW

Michelle McGrath, LICSW is a licensed therapist who is transgender, with a private practice in Arlington, Massachusetts. She has worked with the LGBTQIA community for 10 years. She has taught at Framingham State University in the Counseling Psychology Graduate Program for several years. As well, she is on the Board of Directors for The Northeastern Society of Group Psychotherapy (NSGP) and has presented on multiple topics for the organization. She is a                         member of The  World Association of Transgender Health (WPATH) and a long                  standing member of National Association of Social Workers (NASW).

Geri Reinhardt, LICSW

Geri Reinhardt, CSW, LICSW has a private practice in Newton, Massachusetts.

P.O. Box 356, Belmont, MA 02478     (617) 431-6747

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